Helwan (Cairo) Threshold Days by Year (EGE00147730)

12 fixed thresholds counted per year at Helwan (Cairo) (EGE00147730): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Helwan (Cairo) Thresholds

Helwan (Cairo): days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 1935 with 193.
Helwan (Cairo): days with a maximum temperature at or above 35 C (95 F) in 50 years, most in 1928 with 100.
Helwan (Cairo): days with a maximum temperature at or above 40 C (104 F) in 50 years, most in 1916 with 21.
Helwan (Cairo): days with a maximum temperature at or above 90 F (32.2 C) in 50 years, most in 1905 with 157.
12 fixed thresholds have at least one qualifying day at Helwan (Cairo).

Days at or above 30 C (86 F)

50 years with a qualifying day

Days per year at Helwan (Cairo) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 193 in 1935.

Days at or above 30 C (86 F) per year at Helwan (Cairo)
Year	Days	Decade average
1904	165	165.5
1905	181	165.5
1906	162	165.5
1907	152	165.5
1908	156	165.5
1909	177	165.5
1910	154	170.6
1911	160	170.6
1912	159	170.6
1913	162	170.6
1914	166	170.6
1915	164	170.6
1916	189	170.6
1917	179	170.6
1918	186	170.6
1919	187	170.6
1920	170	173.8
1921	148	173.8
1922	173	173.8
1923	155	173.8
1924	181	173.8
1925	178	173.8
1926	179	173.8
1927	190	173.8
1928	186	173.8
1929	178	173.8
1930	181	179.8
1931	187	179.8
1932	179	179.8
1933	166	179.8
1934	174	179.8
1935	193	179.8
1936	187	179.8
1937	183	179.8
1938	156	179.8
1939	192	179.8
1940	175	170.4
1942	177	170.4
1943	161	170.4
1944	175	170.4
1945	157	170.4
1946	173	170.4
1947	181	170.4
1948	164	170.4
1950	171	170.5
1951	171	170.5
1952	178	170.5
1953	172	170.5
1954	166	170.5
1957	165	170.5

For each year, a bar from the first to the last day at Helwan (Cairo) meeting 30 C (86 F).

First to last qualifying date each year at Helwan (Cairo)
Year	First date	Last date
1904	1904-03-19	1904-10-30
1905	1905-03-25	1905-11-17
1906	1906-03-25	1906-10-18
1907	1907-04-04	1907-11-05
1908	1908-03-10	1908-11-11
1909	1909-03-12	1909-11-20
1910	1910-04-01	1910-10-27
1911	1911-04-05	1911-11-04
1912	1912-04-02	1912-11-18
1913	1913-03-24	1913-10-21
1914	1914-02-27	1914-11-02
1915	1915-03-09	1915-11-20
1916	1916-03-03	1916-11-26
1917	1917-03-25	1917-11-16
1918	1918-03-20	1918-11-21
1919	1919-02-22	1919-11-18
1920	1920-03-18	1920-11-05
1921	1921-03-11	1921-10-31
1922	1922-03-23	1922-11-06
1923	1923-03-13	1923-11-10
1924	1924-02-20	1924-11-01
1925	1925-03-17	1925-11-17
1926	1926-03-21	1926-11-09
1927	1927-02-21	1927-12-29
1928	1928-01-31	1928-11-14
1929	1929-03-07	1929-11-20
1930	1930-03-13	1930-11-07
1931	1931-03-09	1931-10-31
1932	1932-02-16	1932-11-04
1933	1933-02-28	1933-11-19
1934	1934-03-03	1934-11-16
1935	1935-01-27	1935-10-28
1936	1936-02-28	1936-11-19
1937	1937-03-11	1937-12-18
1938	1938-04-05	1938-11-03
1939	1939-03-27	1939-11-05
1940	1940-03-28	1940-10-31
1942	1942-02-25	1942-11-19
1943	1943-04-04	1943-11-20
1944	1944-02-28	1944-11-03
1945	1945-04-24	1945-11-14
1946	1946-03-09	1946-11-18
1947	1947-02-28	1947-11-30
1948	1948-03-28	1948-11-03
1950	1950-03-01	1950-11-07
1951	1951-03-06	1951-11-15
1952	1952-03-14	1952-12-09
1953	1953-02-15	1953-11-11
1954	1954-03-16	1954-11-15
1957	1957-03-18	1957-11-04

Every Fixed Threshold

Fixed thresholds at Helwan (Cairo)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	50	193	1935	165
35 C (95 F): Days	50	100	1928	61
40 C (104 F): Days	50	21	1916	2
45 C (113 F): Days	11	4	1916	1
90 F (32.2 C): Days	50	157	1905	111
100 F (37.8 C): Days	50	48	1916	10
110 F (43.3 C): Days	21	7	1916	1
0 C (32 F): Frost days (min	1	1	1950	1
20 C (68 F): Tropical nights (min	50	139	1953	126
25 C (77 F): Days with min	48	7	1915	6
10 mm (0.39 in): Days with 10 mm or more rain	24	3	1908	1
25 mm (0.98 in): Days with 25 mm or more rain	7	2	1945	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Helwan (Cairo) threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Helwan (Cairo) Threshold Days by Year (EGE00147730)

Key Facts for Helwan (Cairo) Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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